0.7.0

• More README.md updates for 0.7.0 (#56)
• README.md updates for 0.7.0
• MIT license by default
• Add tests with generateExample: true setting
• Add mockable jsonfile object to the library API
• fake execa object that can be mocked from the API
• factor out lib/utils/exec.js
• Fix handling of default platforms value in lib API
• Add limited jest testing with snapshots
• do lint in test script
• Add mockable fs Object option to library API
• Fix internal renderTemplateIfValid function
• remove mkdirp (no longer needed)
• include .swift files in podspec
• remove createFile and createFolder, in favor of using fs-extra
• Remove unused utils hasPrefix and isUppercase